Table of Contents
Advertisement
12. TROUBLESHOOTING
MELSEC-A
12.4 Troubleshooting OFF
This section describes basic troubleshooting procedures for the AlSJ71C24.
The User's Manuals give information on PC CPU module troubleshooting.
12.4.1 Troubleshooting flow
chart
The state of errors is described as follows:
(1) Computer link function
I
Error
1
YES
,
See Section 12.4.2 when the
'RUN.
LED is
turned OFF.
YES
.
See Section 12.4.3 when the neutral state
does not change.
YES
,
See Section 12.4.3 when the data is not
received.
.
YES
,
See Section 12.4.4 when the C/N (LED No. 11)
is turned ON.
YES
,
See Section 12.4.5 when the communications
sometimes fails.
YES
If only 'NAK" is received, an 'error code" is
transmitted according to the protocol. Check
the error codes in Sections 12.1 or 12.2.
Advertisement
Table of Contents
